368 



"May 30 the larvae were .1 of an inch and less in length; entirely white, 

 except claws and mandibles. The body is not flattened at this stage. The first 

 ring is broad, and the head may be well withdrawn into it. The tubercular 

 hairs are spined, plainly seen under a moderate magnifying power. 



"June 3 the largest had evidently moulted, length then .2 of an inch, pale 

 green, eighth and ninth rings yellow. Lateral tufts more conspicuous. Dorsal 

 line faint. Subsequent changes not noted until full-grown larva was described 

 the latter part of June. Length .34 to .4 of an inch. Pale pea green, head paler; 

 dorsal stripe of three white lines, the middle one the finest and most clearly 

 defined. The seventh, eighth and ninth rings yellow. The posterior subdorsal 

 papilla of the body rings bears two unequal hairs, the anterior but one; above 

 the spiracles and in front of them also is a papilla; below the same there are 

 two, from which arise long hairs, five from posterior and ten or twelve from 

 anterior, these are spread out fan-like; below these a prominent longitudinal 

 fold. From the first ring proceed long hairs reaching over and bej'ond the 

 head. Hairs all unbranched and plumose. The body is considerably flattened, 

 so when looking down upon it the spiracles from either side may be seen at 

 once, spiracles conical, rings black. 



"The f'<P" is .3 of an inch in length; light green, some of them have a 

 reddish stripe along dorsal part of the abdomen, the conical spiracles of such 

 have the same hue. The upper part of the rings well clothed, especially at 

 extremities and along the lateral ridges. Pupa fastens to a tuft of silk by 

 means of the hooks of the last ring. Moth appears through greater part of 

 July." 



Form DECLivis Meyrick. PI. XLII, fig. 2. PI. L, fig. 2. 

 iAlucita cincrascens Dyar (not Wlsm.) Proc. U. S. N. M. XXV, 399, 1902 



(biol.). 

 Ptcroplinrus dcclivis Meyrick, Exot. Microlep. I, 112, 1913. 

 Id., Wagner's Lep. Cat. pars 17, 25, 1913. 

 Barnes & McDunnough, Check List 151, 1917. 



Dcclivis differs from montana in that the primaries are more or less heav- 

 ily irrorate with brown scales and the brown marks are heavier. The abdomen 

 in some specimens has a few dorsal dots. Expanse 14-16 mm. 



Distribution: Ont., July (N. M.) ; Man., Mar.; Colo., June. 



We have before us two of the specimens reared by Dyar and 

 Caudcll in Colorado. These are darker than the paratypes of mon- 

 tana in the Fernald collection and lighter than our Manitoba examples, 

 but Mr. Meyrick returned one to us as dcclivis after comparing it with 

 the type, and at the same time noted its apparent relationship with 

 montana. The differences in larval habit noted by Dyar and Kelli- 

 cott have led us to make a very careful examination of these two speci- 

 mens, montana Kellicott, and Walsingham's paratypes, but minute 

 comparison fails to disclose any differences of specific value. 



